GEORGE CLOONEY & STACY KEIBLER

From Oscar to Split: 5 monthsHe won the night's biggest honor in 2013 – Best Picture, for co-producing Argo – but by July, Clooney had lost his girlfriend of two years, former wrestler/model Stacy Keibler. While the actor has long had a reputation as a bachelor who just won't commit, a source told PEOPLE that Keibler was the one who pulled the plug.